Diving atEast Reef (Cambodia)
Cambodia's coastal waters, particularly around the Koh Rong island group, hold remnants of centuries of maritime activity. East Reef, a shallow coral expanse near Saracen Bay, invites divers to explore a more tranquil, natural aspect of this historical region. It provides an accessible entry point to the Gulf of Thailand's underwater world, catering to both new and experienced divers seeking a relaxed experience. This site is especially favored for foundational dive training and recreational exploration.
Evening condition tracking at East Reef features an air temperature of 29.7°C. We have recorded wave heights measuring 0.46m during this period. These figures outline the environmental parameters currently present.
Dive Site Coordinates
10.6056, 103.3206
Dive Site Characteristics
Key Dive Site Facts
Dive Site Overview
East Reef offers a shallow fringing reef system off Cambodia’s Koh Rong/Koh Rong Samloem island group, delivering an easy recreational boat dive experience. The reef's expansive coral garden terrain begins close to the surface, making this a comfortable location for foundational check dives, open water training, and relaxed underwater photography.
Dives here typically follow a gentle circuit, guiding divers over the reef top and along its edges where the vibrant coral landscape gradually gives way to sandy and rubble areas. This transition zone is particularly interesting for spotting bottom dwellers. Hard-coral formations, an array of colorful sponges, and scattered bommies define the underwater topography, providing ample shelter for a diverse range of reef fish.
Maximum depths at the site consistently stay within 8 to 10 m / 26 to 33 ft. This shallow profile supports extended bottom times, allowing for unhurried exploration and observation.
Water temperatures are remarkably stable and warm, frequently between 28-30°C / 82-86°F throughout the year, ensuring thermal comfort. On the surface, air temperatures average 27-29°C / 81-84°F during the most active diving periods, complementing the pleasant underwater conditions.
Best Time to Dive
Clear visibility becomes a primary draw at East Reef, and conditions are often best during the northeast monsoon season, which spans from December through April. This period brings sunny, dry weather and significantly less rainfall, typically below 3 mm / 0.12 inches monthly, reducing sediment runoff. Dive scores during these months are consistently rated as 'Excellent,' correlating with calmer seas where average wave heights hover around 0.4 meters or less. While water temperatures are stable at 28-30°C / 82-86°F throughout the year, air temperatures peak from February to April, reaching up to 29°C / 84°F. Though visibility can range widely across Cambodia's sites, the dry season generally provides the clearest conditions for exploring East Reef's sunlit shallows.
Climate Historical Averages
Monthly records compiled from satellite and marine observation nodes over the last 3 years. Data provided by Open-Meteo and MET Norway.
Dive Experience & Conditions
Currents at East Reef are typically mild, making this an accessible site for divers of varying experience levels, including those undertaking PADI Open Water Diver certification or Discover Scuba Diving programs. The site's shallow profile, with maximum depths of 8-10 m / 26-33 ft, ensures a relaxed experience with minimal physical demands. It's an excellent location for underwater photography, especially given the abundant light penetration in the coral gardens. Water temperatures are consistently warm, staying around 28-30°C / 82-86°F, minimizing the need for thick thermal protection. Wave heights are generally low, particularly during the dry season, although conditions can become choppier during monsoon periods from May to November, potentially affecting boat travel and surface comfort.
Dive Difficulty & Safety Guidelines
While East Reef presents few inherent hazards, divers should always practice excellent buoyancy control to protect the delicate coral structures. It's crucial to avoid contact with the reef and its inhabitants. As with any dive location in Cambodia, research dive operators thoroughly; service quality can vary. A surface marker buoy (SMB) is recommended for all dives, especially given the boat entry and exit procedures, ensuring surface visibility to boat traffic. Being a shallow site, decompression sickness is less of a concern, but proper ascent rates and safety stops remain fundamental practices for every dive.
Recommended Equipment
No verified equipment items yet.
Verified equipment recommendations for this dive site are being reviewed and may be added as additional source checks are completed.
Recommended Dive Suit
Divers who spend more time observing marine life often prefer slightly warmer gear.
Environmental readings suggest that the waters surrounding East Reef are about 31°C (88°F) at the moment. Surface air temperatures are resting at 30°C (85°F). Water temperatures in this range are often well suited to diving with dive skin or rash guard. A hood or vest is suggested for sensitive divers due to surface winds.
Environmental conditions appear stable for the near future.
Conditions last reviewed: 18:00 using the latest environmental data.
Dive Logistics & Preparation
Hyperbaric Chamber
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Entry Requirements
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Currency
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Nearest Airports
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Marine Life at East Reef
East Reef's extensive coral garden terrain defines a vibrant underwater landscape, creating a rich habitat for numerous marine species. Divers often encounter an abundance of diverse reef fish, frequently observed schooling among the hard-coral structures, sponges, and scattered bommies. The site is a reliable location for spotting stingrays, which glide gracefully across the sandy patches bordering the reef. Clownfish are a common sight, found interacting with their host anemones, while giant pufferfish frequently make their presence known. For those interested in smaller details, numerous nudibranchs inhabit the reef, providing flashes of color for macro photography enthusiasts exploring the intricate coral formations.
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Frequently Asked Questions
What is the typical depth range at East Reef?
East Reef is a shallow dive site. Depths typically range from 8 to 10 m / 26 to 33 ft, making it suitable for divers of all experience levels.
What is the water temperature like?
Water temperatures at East Reef are consistently warm throughout the year, usually staying between 28-30°C / 82-86°F. This allows for comfortable diving with minimal thermal protection.
What kind of marine life can I expect to see?
The reef hosts a variety of marine life including stingrays, clownfish, and giant pufferfish. You'll also likely spot numerous nudibranchs and a dense population of reef fish among the corals.
What dive certifications are suitable for East Reef?
East Reef is ideal for PADI Open Water Divers and those participating in Discover Scuba Diving experiences. Its shallow, calm conditions make it excellent for training and relaxed recreational dives.
How do divers access East Reef?
Access to East Reef is typically by boat. It's a popular site in the Koh Rong/Koh Rong Samloem island group, often reached via dive operators from nearby bays or the main islands.
When is the best time of year to dive East Reef?
The optimal diving season runs from December through April during the dry, northeast monsoon period. Conditions during these months offer the best visibility, calmer seas, and minimal rainfall.
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